Ch. 7 Lesson 1 and 2- The Solar System

Small chunks of ice and rock formed small bodies called _____________.

A(n) ___________________ is the average distance between the sun and Earth.

In the _______________ model, the Earth is at the center of the revolving planets and stars.

Scientists think the solar system formed about...

The solar system was formed from a ___________ of gas and dust the pulled together by gravity.

_______________ proved the heliocentric model right based on his observations of Jupiter.

_________________ was the astronomer who placed the planets in order around the sun.

The solar system consists of the sun, the ____________, their moons, and other smaller objects.

Out of all of the planets, the largest planet is _____________.

The planets' orbits around the sun are not circular but more _________________.